Download KA337 / LM337 3-Terminal 1.5 A Negative Adjustable Regulator 3-T

KA337 / LM337
3-Terminal 1.5 A Negative Adjustable Regulator
Features
•
•
•
•
•
•
•
Description
Output-Current in Excess of 1.5 A
Output-Adjustable Between -1.25 V and -37 V
Internal Thermal Overload Protection
Internal Short-Circuit Current Limiting
Output-Transistor Safe Area Compensation
Floating Operation for High-Voltage Applications
Standard 3-Pin TO-220 Package
The KA337 / LM337 are 3-terminal negative adjustable
regulators. They supply in excess of 1.5 A over an output
voltage range of -1.25 V to -37 V. These regulators
require only two external resistors to set the output voltage and employ current limiting, thermal overload protection, and safe area compensation.
TO-220
Input
1
1. Adj 2. Input 3. Output
Ordering Information
Product Number
Package
KA337TU
TO-220 (Dual Gauge)
LM337T
TO-220 (Single Gauge)
Packing Method
Operating Temperature
Rail
0°C to +125°C
Block Diagram
Vadj
1
Voltage
Reference
3
Output
+
Protection
Circuitry
2
Input
Figure 1. Block Diagram
© 2011 Fairchild Semiconductor Corporation
KA337 / LM337 Rev. 1.1.0
www.fairchildsemi.com
1
KA337 / LM337 — 3-Terminal 1.5 A Negative Adjustable Regulator
July 2013
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The
absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted.
Symbol
IVI - VOI
PD
Parameter
Value
Input-Output Voltage Differential
Power Dissipation
RθJC
Thermal Resistance, Junction to Case
TOPR
Operating Temperature Range
TSTG
Storage Temperature Range
Unit
40
V
Internally Limited
W
4
°C/W
0 to +125
°C
-65 to +125
°C
Electrical Characteristics
VI - VO = 5 V, IO = 40 mA, 0°C ≤ TJ ≤ +125°C, PDMAX = 20 W; unless otherwise specified.
Symbol
Rline
Rload
IADJ
ΔIADJ
Parameter
Line Regulation(1)
Load Regulation(1)
Conditions
Min.
Typ.
Max.
TA = +25°C,
3 V ≤ I VI - VO I ≤ 40 V
0.01
0.04
3 V ≤ I VI - VO I ≤ 40 V
0.02
0.07
TA = +25°C,
10 mA ≤ IO ≤ 0.5 A
15
50
10 mA ≤ IO ≤ 1.5 A
15
150
50
100
μA
2
5
μA
Adjustable Pin Current
Adjustable Pin Current Change
TA = +25°C,
10 mA ≤ IO ≤ 1.5 A,
3 V ≤ I VI - VO I ≤ 40 V
TA =+25°C
-1.213
-1.250
-1.287
3 V ≤ I VI - VO I ≤ 40 V,
10 mA ≤ IO ≤ 1.5 A
-1.200
-1.250
-1.300
VREF
Reference Voltage
STT
Temperature Stability
0°C ≤ Tj ≤ +125°C
0.6
Minimum Load Current to Maintain
Regulation
3 V ≤ I VI - VO I ≤ 40 V
2.5
10.0
3 V ≤ I VI - VO I ≤ 10 V
1.5
6.0
IL(MIN)
eN
RMS Noise, % of VOUT
RR
Ripple Rejection Ratio
ST
Long-Term Stability
TA =+25°C,
10 Hz ≤ f ≤ 10 kHz
CADJ = 10 μF
(2)
TJ = 125°C, 1000 Hours
V
mA
dB
77
0.3
mV
%
60
66
%/ V
%
0.003
VO = -10 V, f = 120 Hz
Unit
1.0
%
Notes:
1. Load and line regulation are specified at constant junction temperature. Change in VO due to heating effects must be
taken into account separately. Pulse testing with low duty is used.
2. CADJ, when used, is connected between the adjustment pin and ground.
© 2011 Fairchild Semiconductor Corporation
KA337 / LM337 Rev. 1.1.0
www.fairchildsemi.com
2
KA337 / LM337 — 3-Terminal 1.5 A Negative Adjustable Regulator
Absolute Maximum Ratings
50
0.06
VIN = -8 V to -45 V
VIN = -6.25 V
IO = 10 mA to 0.5 A
IO = 4 mA
VOUT = -1.25 V
IO = 10 mA to 1.5 A
RLoad - Load Regulatoion (mV)
RLINE - Line Regulatoion (%)
0.07
VOUT = -5 V
0.05
0.04
0.03
o
Datasheet specs at 25 C [%]
Min: Typ: 0.01
Max: 0.04
0.02
0.01
0.00
-40
40
IO = 10 mA to 1.5 V
30
o
20
Datasheet specs at 25 C [%]
Min: Typ: 15 mV
Max: 50 mV
10
0
-20
0
20
40
60
80
100
120
-40
-20
0
o
60
80
100
120
Figure 3. Load Regulations vs. Temperature
100
10
IO = 40 mA
80
60
40
o
Datasheet specs at 25 C [%]
Min: Typ: 50 μA
Max: 100 μA
20
VI - VO = 3 V to 40 V, IO = 10 mA
VI - VO = 3 V to 40 V
IADJ - Adjustable Pin Current (μA)
VI - VO = 5 V
IADJ - Adjustable Pin Current (μA)
40
TA - Temperature[ C]
Figure 2. Line Regulation vs. Temperature
0
VI - VO = 3 V to 40 V, IO = 1.5 A
IO = 10 mA to 1.5 V
VI - VO = 3 V, IO = 10 mA to 1.5 A
8
VI - VO = 40 V, IO = 10 mA to 1.5 A
6
o
Datsheet specs at 25 C
Min:
Typ: 2 μA
Max: 5 μA
4
2
0
-40
-20
0
20
40
60
80
100
120
-40
-20
0
o
20
40
60
80
100
120
o
TA - Temperature[ C]
TA - Temperature[ C]
Figure 4. Adjustable Pin Current vs. Temperature
Figure 5. Adjustable Pin Current Change
vs. Temperature
1.30
10
VI - VO = 3 V, IO = 1.5 A
IO = 10 mA to 1.5 V
m
VI - VO = 5 V, IO = 40 mA
1.28
VI - VO = 40 V, IO = 10 mA
VI - VO = 40 V, IO = 1.5 A
1.26
o
Datsheet specs at 25 C
Min: 1.213 V
Typ: 1.25 V
Max: 1.287 V
1.22
1.20
V=3V
VI - VO = 10 V
VI - VO = 3 V to 40 V
VI - VO = 40 V
8
6
Datsheet specs
Min:
Typ: 2.5 A
Max: 10 A
m m
1.24
ILMIN - Minimum Load Current [ A]
VI - VO = 3 V, IO = 10 mA
VI - VO = 3 V to 40 V
IADJ - Adjustable Pin Current (μA)
20
o
TA - Temperature[ C]
4
2
0
-40
-20
0
20
40
60
80
100
120
-40
o
0
20
40
60
80
100
120
TA - Temperature[ C]
Figure 6. Reference Voltage vs. Temperature
© 2011 Fairchild Semiconductor Corporation
KA337 / LM337 Rev. 1.1.0
-20
o
TA - Temperature[ C]
Figure 7. Minimum Load Current vs. Temperature
www.fairchildsemi.com
3
KA337 / LM337 — 3-Terminal 1.5 A Negative Adjustable Regulator
Typical Performance Characteristics
80
RR - Ripple Rejection Ratio (dB)
VOUT = -10 V
75
w/o CADJ
CADJ = 10 μF
with CADJ
70
65
60
55
Datasheet specs w/o CADJ
Min:
Typ: 60 dB
Max:
with CADJ
Min: 66 dB
Typ: 77 dB
Max:
50
-40
-20
0
20
40
60
80
100
120
o
TA - Temperature[ C]
Figure 9. Ripple Rejection vs. Temperature
Figure 8. Noise Voltage vs. Temperature
3.5
0.9
o
Test specs at 25 C [%]
Min: 0.08 A
Typ: 0.25 A
Max: 0.9 A
VOUT = GND
0.7
IADJ - Adjustable Pin Current (μA)
ISCC - Short Circuit Current (A)
VI - VO = 40 V
0.8
0.6
0.5
0.4
0.3
0.2
0.1
o
V I - VO = 5 V
Test specs at 25 C
Min: 1.5 A
Typ: 2.5 A
Max: 3.5 A
3.0
2.5
2.0
1.5
-40
-20
0
20
40
60
80
100
-40
120
o
0
20
40
60
80
100
120
TA - Temperature[ C]
Figure 10. Short-Circuit Currents vs. Temperature
© 2011 Fairchild Semiconductor Corporation
KA337 / LM337 Rev. 1.1.0
-20
o
TA - Temperature[ C]
Figure 11. Peak Current vs. Temperature
www.fairchildsemi.com
4
KA337 / LM337 — 3-Terminal 1.5 A Negative Adjustable Regulator
Typical Performance Characteristics
KA337 / LM337 — 3-Terminal 1.5 A Negative Adjustable Regulator
Typical Application
IPROG
CI(3)
1 μF
R2
+
+
(4)
Co
1 μF
R1
120 Ω
Iadj
Vadj
-VI
VI
KA337 / LM337
VO
-VO
Figure 12. Typical Application
Notes:
3. CI is required if regulator is located more then 4 inches from power supply filter.
1.0 μF solid tantalum or 10 μF aluminum electrolytic is recommended.
4. CO is necessary for stability. 1.0 μF solid tantalum or 10 μF aluminum electrolytic is recommended.
VO = -1.25 V (1 + R2 / R1).
© 2011 Fairchild Semiconductor Corporation
KA337 / LM337 Rev. 1.1.0
www.fairchildsemi.com
5
KA337 / LM337 — 3-Terminal 1.5 A Negative Adjustable Regulator
Physical Dimensions
TO-220 [ SINGLE GAUGE ]
Figure 13. TO220, MOLDED, 3-LEAD, JEDEC, VARIATION AB
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the
warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/dwg/TO/TO220B03.pdf.
For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area:
http://www.fairchildsemi.com/packing_dwg/PKG-TO220B03.pdf.
© 2011 Fairchild Semiconductor Corporation
KA337 / LM337 Rev. 1.1.0
www.fairchildsemi.com
6
KA337 / LM337 — 3-Terminal 1.5 A Negative Adjustable Regulator
Physical Dimensions (Continued)
TO-220 [ DUAL GAUGE ]
Figure 14. TO220, MOLDED, 3-LEAD, NON-JEDEC, VARIATION AB
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the
warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/dwg/TO/TO220Y03.pdf.
For current tape and reel specifications, visit Fairchild Semiconductor’s online packaging area:
http://www.fairchildsemi.com/packing_dwg/PKG-TO220Y03.pdf.
© 2011 Fairchild Semiconductor Corporation
KA337 / LM337 Rev. 1.1.0
www.fairchildsemi.com
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